php - PHP：如何从微时间回显剩余时间（以分钟为单位）

Question

以下以秒为单位显示时间，并以分钟为单位显示，我如何转换为分钟？

$query = "SELECT * FROM messages WHERE ip = '$ip' AND mtime >= NOW() - INTERVAL 5 MINUTE ORDER by mtime DESC";
$result = mysql_query($query);

if (mysql_num_rows($result) > 0) {
    $row = mysql_fetch_assoc($result);
    $diff = microtime(true) - $row['mtime']; //here the time difference between last sended message and this try
    $remaining = (5*60 - (int) $diff);
   echo $remaining;
}
else {
    ...
}

谢谢。

Answer 1

一 (1) 分钟有六十 (60) 秒。要将秒转换为分钟，只需将秒数除以六十 (60)。

$tstart = (string) microtime(true); // casting to string shows type doesn't matter
sleep(3); // for variance
$tstop = microtime(true);
$diffSeconds = round($tstop-$tstart);
$diffMinutes = ceil($diffSeconds/60); // here is the division

echo $diffSeconds.'second'.($diffSeconds==1?'':'s')."\n"; // assuming plain text out
echo $diffMinutes.'minute'.($diffMinutes==1?'':'s')."\n";

输出：

以秒为单位：3.0001471042633

以分钟为单位：0.050002451737722